A.4.0 B.5.0 C.7.0 D.10.0 E.14.0
A.加H2O B.加NH4Cl C.加HAc D.加NaCl E.加HCl
A.1.8×10-4 B.1.8×10-18 C.5.6×10-11 D.5.6×103 E.1.8×10-10